Niobium powder and solid electrolytic capacitor

The present invention provides an electrolytic capacitor that is large in electrostatic capacity and small in loss coefficient and that is produced by adding trace-amount components to niobium powder to reduce the leak current and increase the electrostatic capacity of a solid electrolytic capacitor...

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Bibliographic Details
Main Authors SAITOU, SUSUMU, EBATO, OSAMU, KIRIHARA, TADASU, SATO, NOBUYUKI
Format Patent
LanguageEnglish
Published 21.11.2006
Edition7
Subjects
ALLOYS
BASIC ELECTRIC ELEMENTS
CAPACITORS
CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
CASTING
CHEMISTRY
ELECTRICITY
FERROUS OR NON-FERROUS ALLOYS
MAKING METALLIC POWDER
MANUFACTURE OF ARTICLES FROM METALLIC POWDER
METALLURGY
PERFORMING OPERATIONS
POWDER METALLURGY
TRANSPORTING
TREATMENT OF ALLOYS OR NON-FERROUS METALS
WORKING METALLIC POWDER
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Summary:The present invention provides an electrolytic capacitor that is large in electrostatic capacity and small in loss coefficient and that is produced by adding trace-amount components to niobium powder to reduce the leak current and increase the electrostatic capacity of a solid electrolytic capacitor. A specific production method comprises using, as a raw material, niobium powder containing at least 1 ppm and up to 600 ppm of hydrogen, and at least 1 ppm and up to 200 ppm of carbon or at least 1 ppm and up to 50 ppm of nickel, the remaining portion substantially consisting of niobium, and forming the sintered body of the powder inside a solid electrolytic capacitor (10) as an anode.
Bibliography:Application Number: TW200392101259